Method for quantitative evaluation of characteristics of micro-pore structure of deeply-buried high-pressure low-permeability sandstone reservoir stratum
A quantitative evaluation, micro-porosity technology, used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc. The problem of large radius
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[0026] Select certain oil field sample below in conjunction with accompanying drawing and describe the present invention in detail.
[0027] The present invention quantitatively evaluates the method for microscopic pore structure characteristics of deep high-pressure low-permeability sandstone reservoirs, see figure 1 shown, including the following steps:
[0028] Step 1: Drill a standard plunger rock sample with a diameter of 2.5 cm, wash the oil and dry it.
[0029] Step 2: Measuring the porosity and permeability of the standard core after oil washing and drying by means of gas detection.
[0030] Step 3: Take a small piece of rock sample from the plunger rock sample, vacuumize it, and then soak it in mercury solution.
[0031] Step 4: Inject mercury into the core at a constant speed of 0.00005mL / min. During the mercury injection process, the pressure drops and rises periodically, and the experiment ends when the pressure reaches the highest pressure 900psi that the consta...
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